NX二次开发中有关表达式的操作代码分享

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NX二次开发中有关表达式的操作代码分享
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1. 
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2. <p>static void do_UGopen_api(void)
   
3. {
   
4. // create block 1
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5. double coner[3] = {0,0,0};
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6. char *edges[3] = {"l=100","w=100","h=20"};
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7. tag_t blk_tag;
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8. UF_MODL_create_block1(UF_NULLSIGN,coner,edges,&blk_tag);
   
9. // create a hole
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10. double dir[3] = {0,0,1};
    
11. double coner1[3] = {50,50,0};
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12. tag_t cyl_tag;
    
13. UF_MODL_create_cyl1(UF_POSITIVE,coner1,"h+30","50",dir,&cyl_tag);</p><p> /*
    
14. create expression and delete it
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15. */
    
16. // create expression
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17. char *exp_str,*str,*value;
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18. exp_str = "new_exp= 100";
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19. tag_t new_exp,old_exp_tag;
    
20. char *str_exp,*str_old_exp;
    
21. int nums;
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22. tag_t *exps;
    
23. // before create the new expression, we need check if the expressions have been created or not
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24. // if having, we delete it
    
25. tag_t part= UF_PART_ask_display_part();
    
26. UF_MODL_ask_exps_of_part(part,&nums,&exps);
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27. UF_UI_open_listing_window();
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28. if(nums != 0 )
    
29. {
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30.   for(int i = 0 ; i < nums; i++)
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31.   {
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32.    UF_MODL_ask_exp_tag_string(exps[i],&str_old_exp);
    
33.    UF_MODL_dissect_exp_string(str_old_exp,&str,&value,&old_exp_tag);
    
34.    if(!strcmp(str,"new_exp"))
    
35.    {
    
36.      //UF_UI_write_listing_window("we find the alreay expressions ==> new_exp and delete it \n");
    
37.      //delete expression
    
38.      UF_MODL_delete_exp(str);
    
39.      UF_MODL_update();
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40.      break;
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41.    }
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42.   }
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43. }
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44. //UF_UI_write_listing_window("we can not find the expression ==> new_exp and create it \n");
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45. UF_MODL_create_exp_tag(exp_str,&new_exp);
    
46. UF_UI_write_listing_window("The new created expression is : \n");
    
47. UF_MODL_ask_exp_tag_string(new_exp,&str_exp);
    
48. UF_UI_write_listing_window(str_exp);
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49. UF_free(str_exp);
    
50. UF_free(str);
    
51. UF_free(value);
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52. UF_UI_write_listing_window("\n");</p><p>｝</p>

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